Damage Growth Simulation of Honeycomb Sandwich Panel in Drop-weight Impact Test

Abstract

In this study, drop-weight impact tests were performed for honeycomb sandwich panel specimens with various impact energies. In addition, damage growth simulations of the honeycomb sandwich panel were performed considering Coulomb friction, surface-based cohesive behavior, and continuum damage dynamics in order for simulating fixing specimen with jig, plastic deformation of faceplate, faceplate/adhesive-layer interface failure, adhesive layer failure, and honeycomb failure. Specimen failure morphology such as damage and debonding, indent depth, and load-time curve (load history) obtained from impact tests are compared with simulating results. The present numerical model shows good agreement with experimental results in terms of above comparisons. This study mainly presents modeling procedure for this high-fidelity simulation for drop-weight tests.